Ventilating sewers



GREAVES.

NG SEWERS.

Patented July '7, 1885.

Il! IIll Hui III-.l 'VIII '(No Model.)

G. HAR

VENTILATI WI NESS E51 IINTTED STATES PATENT EEicE.

GEORGE HARGREAVES, OF DETROIT, MICHIGAN.

VENTILATING lslawi-:Ra

SPECIFICATION forming part of Letters Patent No. 321,719, dated July 7,1885.

Application tiled October 20, 1884.

To al?, whom if; may concern,.-

Beit known that l, GEORGE HARGREAvEs, a citizen of the United States,residing at Detroit,iii the county of Wayneand State of Michigan, haveinvented certain new and useful Improvements in Ventilating Sewers, andI do declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to letters or figures of reference markedthereon, which form a part of this specification.

Figurel of the drawings is a vertical longitudinal sectional view of mydevice. Fig. 2 is a detail view of the device for operating the doors onthe openings into the sewer. Fig. 3 is a inodiiication of theair-opening into the sewer. Fig. t is a sectional detail view,

This invention relates to improvements in Ventilating sewers andconsuming the sewergas by lire, and is intended to draw theventilating-air into the sewers from the lowest and most impure stratumof the atmosphere nearest the ground or earth, and thereby destroy anygerms of disease that may exist there.

The invention consists in the construction, novel arrangement, andadaptation of devices, as will be hereinafter more fully set forth andclaimed.

In the accompanying drawings, A represents the Vertical longitudinalsection of a sewer, ot' which a represents the sewage, and a theair-space above the same.

A is the mouth of a similar sewer at right angles to and openinginto A.

a2 is the tube or flue by which the sewer A, and, if desired, A, openinto the chimney B, of which b is the grate and fire, b the ash-pit, andb2 the foundation.

b3 is a chute by which fuel is introduced to the fire, and Z)4 is anopening opposite the chute, through which the fire is raked and the coaldistributed. In some cases it is preferable to arrange the chimneys atthe lower ends of the sewers instead of the upper ends, as shown in thedrawings.

C C are the tubes or iiues that admit the air to the sewers. The luesmay be either straight or inclined, and may have the same diameter (Nomodel.)

throughout, or may be smaller at their lower ends than at their upper,as shown.

c c are the gratings covering the lues C C, and c c are the doors orvalves at their lower ends. Each of these valves opens inwardly on itshinge, and is opened and closed by means of the wire or metal chain c2,connected to it opposite its hinge, and passing through a properdirector near the end of the flue C, thence over the pulley o, whence itrises through a proper opening, and is attached to the drum c5, andactuated by-the lever c4 on the said drum. Each door has its own properchain or wire, lever, and drum, and all the drums turn on the same rodor shaft, ce, xed at any proper point to actuate the valves. The valvesmay be kept at any point of opening by means of a ratchet and pawl, orother proper means, connected to the drums of each. When the lines C Chave their lower en ds smaller than their upper, the valves aredispensed with, as shown.

D D are floats, made of any proper material, which show what quantity orheight of water is in the diierent parts of the sewer. The floats D Dhave attached to them the cords or metal chains d d, which iirst passover the pulleys d cl, thence run to the pulleys d2 d, below which theyturn and ascend through proper openings, turn over the pulleys orrollers d3 d, each of which has a bearing on the upright or standard(Z4, and have attached to their depending ends the weights d5 d5. Thestandard d is placed near the levers and drums, s0 that the personoperating the latter may know the height of water in the sewer. As thewater ascends in the sewer the float D also ascends and the weights d5descend upon the standard. The valves c are usually set less widely openas the sewer rises, because it is desirable to draw more air from thelowei' and' more iinpure strata of the atmosphere outside. There is alsocaused thereby a greater range of draft in the sewer when the chimney isat the upper end. N'Vhen the lilies C are of smaller diameter at theirlower ends than at their upper ends, their openings into the sewer growless as they approach the chimney, except in some cases, where thelatter is at the lower end of the sewer.

Having thus described my invention, what IOO Cords or chains connectingthe floats and weights, substantially as specified.

3. The combination, with a sewer and flues having hinged doors or valvesat their lower ends, of a horizontal shaft having one or more drinns,and a lever-handle, and eords connecting lthe valves and drums,substantially as specified.

In testimony whereof I affix iny signature in presence of two witnesses.

GEORGE HARGREAVES.

Witnesses:

@virus J oHNsToN, JOHN STUBENSKY.

